Shulou(Shulou.com)06/02 Report--

This article focuses on "the application of SpringBoot packaging". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "the application of SpringBoot packaging".

I have written a native method of slimming https://my.oschina.net/formatkm/blog/1822900 before.

@ ifu25 mentioned spring-boot-thin-launcher in her reply

Now package the high-end form of the plug-in in spring-boot-thin-launcher. This method is more automated and automatically generates pom, which automatically downloads dependencies at the first run time.

Most of the time, it is deployed in a private network environment and cannot be connected to the public network to download dependencies. Here we mainly record the process of manually separating jar dependencies.

Export dependency

Export dependent jar to a directory Gradle script, run copyToLib task, dependent jar will be exported to lib

Task copyToLib (type: Copy) {into "$buildDir/libs/lib" from configurations.runtime} using the thin-launcher plug-in buildscript {ext {springBootVersion = '2.0.1.RELEASE' wrapperVersion =' 1.0.21.RELEASE'} repositories {mavenLocal () mavenCentral ()} Dependencies {classpath ("org.springframework.boot.experimental:spring-boot-thin-gradle-plugin:$ {wrapperVersion}") classpath ("org.springframework.boot:spring-boot-gradle-plugin:$ {springBootVersion}")} apply plugin: 'io.spring.dependency-management'apply plugin:' org.springframework.boot'apply plugin: 'org.springframework.boot.experimental.thin-launcher'

There will be a Gradle task for thinJar, which can be run to generate an jar package without dependencies

Run the program

Operation of manual external jar

Java-Djava.ext.dirs=./lib/-jar web.jar

-Djava.ext.dirs is the path that specifies the jar runtime to search for dependent libraries

Automatically download dependent runs

Java-Dthin.root=. -jar web.jar

-Dthin.root is the cache directory where jar downloads are configured

Search the directory page of jar and configure it in the MANIFEST.MF file.

Main problem

After generation, you need to carefully debug the dependent jar package from copy, which will be conflicted or missing, especially the log log component and the implicit version of the dependency package.

For example, if you use the undertow container, you need to manually add the dependency reference xnio-nio

'org.jboss.xnio:xnio-nio:3.5.6.Final'

Project address: https://github.com/dsyer/spring-boot-thin-launcher

At this point, I believe that everyone has a deeper understanding of the "SpringBoot packaging application", might as well come to the actual operation of it! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!

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